I Wonder if it is Worth it...

After taking 3 tests this week I have decided that sometimes studying doesn't help. I feel like that questions that I knew on the test I knew before I studied and the questions that I did not know were nowhere in the material that I used to study with. Perhaps I have a slight advantage seeing as how I have a partially photographic memory, nonetheless, I feel as though hours of the time that I spent studying could have been put to better more productive use. However, studying does serve one important task. It makes me feel as though I am more prepared than if I had not studied, whether this is true or not is still up for debate. I at least feel this way about my classes that are theoretical in nature rather than fact driven.